libssh  0.9.4
The SSH library
bytearray.h
1 /*
2  * This file is part of the SSH Library
3  *
4  * Copyright (c) 2018 Andreas Schneider <asn@cryptomilk.org>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 #ifndef _BYTEARRAY_H
21 #define _BYTEARRAY_H
22 
23 #define _DATA_BYTE_CONST(data, pos) \
24  ((uint8_t)(((const uint8_t *)(data))[(pos)]))
25 
26 #define _DATA_BYTE(data, pos) \
27  (((uint8_t *)(data))[(pos)])
28 
29 /*
30  * These macros pull or push integer values from byte arrays stored in
31  * little-endian byte order.
32  */
33 #define PULL_LE_U8(data, pos) \
34  (_DATA_BYTE_CONST(data, pos))
35 
36 #define PULL_LE_U16(data, pos) \
37  ((uint16_t)PULL_LE_U8(data, pos) | ((uint16_t)(PULL_LE_U8(data, (pos) + 1))) << 8)
38 
39 #define PULL_LE_U32(data, pos) \
40  ((uint32_t)(PULL_LE_U16(data, pos) | ((uint32_t)PULL_LE_U16(data, (pos) + 2)) << 16))
41 
42 #define PULL_LE_U64(data, pos) \
43  ((uint64_t)(PULL_LE_U32(data, pos) | ((uint64_t)PULL_LE_U32(data, (pos) + 4)) << 32))
44 
45 
46 #define PUSH_LE_U8(data, pos, val) \
47  (_DATA_BYTE(data, pos) = ((uint8_t)(val)))
48 
49 #define PUSH_LE_U16(data, pos, val) \
50  (PUSH_LE_U8((data), (pos), (uint8_t)((uint16_t)(val) & 0xff)), PUSH_LE_U8((data), (pos) + 1, (uint8_t)((uint16_t)(val) >> 8)))
51 
52 #define PUSH_LE_U32(data, pos, val) \
53  (PUSH_LE_U16((data), (pos), (uint16_t)((uint32_t)(val) & 0xffff)), PUSH_LE_U16((data), (pos) + 2, (uint16_t)((uint32_t)(val) >> 16)))
54 
55 #define PUSH_LE_U64(data, pos, val) \
56  (PUSH_LE_U32((data), (pos), (uint32_t)((uint64_t)(val) & 0xffffffff)), PUSH_LE_U32((data), (pos) + 4, (uint32_t)((uint64_t)(val) >> 32)))
57 
58 
59 
60 /*
61  * These macros pull or push integer values from byte arrays stored in
62  * big-endian byte order (network byte order).
63  */
64 #define PULL_BE_U8(data, pos) \
65  (_DATA_BYTE_CONST(data, pos))
66 
67 #define PULL_BE_U16(data, pos) \
68  ((((uint16_t)(PULL_BE_U8(data, pos))) << 8) | (uint16_t)PULL_BE_U8(data, (pos) + 1))
69 
70 #define PULL_BE_U32(data, pos) \
71  ((((uint32_t)PULL_BE_U16(data, pos)) << 16) | (uint32_t)(PULL_BE_U16(data, (pos) + 2)))
72 
73 #define PULL_BE_U64(data, pos) \
74  ((((uint64_t)PULL_BE_U32(data, pos)) << 32) | (uint64_t)(PULL_BE_U32(data, (pos) + 4)))
75 
76 
77 
78 #define PUSH_BE_U8(data, pos, val) \
79  (_DATA_BYTE(data, pos) = ((uint8_t)(val)))
80 
81 #define PUSH_BE_U16(data, pos, val) \
82  (PUSH_BE_U8((data), (pos), (uint8_t)(((uint16_t)(val)) >> 8)), PUSH_BE_U8((data), (pos) + 1, (uint8_t)((val) & 0xff)))
83 
84 #define PUSH_BE_U32(data, pos, val) \
85  (PUSH_BE_U16((data), (pos), (uint16_t)(((uint32_t)(val)) >> 16)), PUSH_BE_U16((data), (pos) + 2, (uint16_t)((val) & 0xffff)))
86 
87 #define PUSH_BE_U64(data, pos, val) \
88  (PUSH_BE_U32((data), (pos), (uint32_t)(((uint64_t)(val)) >> 32)), PUSH_BE_U32((data), (pos) + 4, (uint32_t)((val) & 0xffffffff)))
89 
90 #endif /* _BYTEARRAY_H */